Die-stock.



W. H. LBAVER.

DIE STOCK.

APPLlUnI1G-PTLED SEPT. 6, 1910.

Patented Mar. 14, 1911.

WILLIAM H. LEAVER,

, thel heard or body of the die stock, usually pivotallyiattachedby headed screws 9, or y `use, andthe #resent improvement involves.

lvIl as shown'. In the preferred form of the UNITED STATES PATENT OFFICE,

OF CHICAG, ILLINOIS, ASSIGNOR TO NYE TOOL .AND MACl-INE WORKS, A-CORPORATION 0I. ILLINGIS.

i nlns'roox.

Specification of Letters Patent.

Application filed September 6, 1910. Serial No. 580,504.

To all 'whom 'it may concern:

Be it known. that I, WILLIAM H. LnAvnu, n'citizen of the Unitedl States of America, and a resident of Chimigo, in the county of Cook and State of Illinois, have invented certain new und useful Improvements in Die-Stocks, of which the following is a speciioation.

This invention relates to portable diesiocks employed in screw-threading stoom, gas and like pipes, and has for its object to provide a simple, compact and efficient structural formation and combination 'oi' 1 parts whereby the radially adjustable screw cutting dies ere-securely looked at their desired adjustment in e rea-dy and substantial manner, all es will hereinafter more fully appeal? In the accompanying drawings: Figure l, is esideelevation, With-parts in section on line'm, o :E adie stoel; embodying the present improvement. Fig. 2, is e front elevation of the same;

Simile-1' reference numerolsindieste like parts in both views.

Referringr to the drawings, l

present improvement the inner ends of Said l lever clamps are beveled and have besring l upon a correspondingly beveled margin of l the anni plete (i, with a vien7 to project but little if any beyond thffoce of the cam plate, to constitute obstructions at such. point in the practical use oi the die-stock, 4 and more particular to prevent :i turning displacement ofthe Iever elamps when the parts :ire in u loosened condition during :in ndjustment of the die jaws.

10 are revoluhle annular Wedge sleeves, screwing upon the soreWl-n'eeded peripheries of the iiendle sockets 2 before described, and having tapering or Wedge ferm inner portions adapted toI engage beneath the outer ends .of the iever clamps S, inet in the adjustments o seid sleeves, pivotal movement of the lever clnmps'upon their pivot screws 9- Wili trike piene, to in one case, hind the innen ends of seid lever clamps iirmly upon the @ein plete 6 to hold the saine to the required circuler sdjustrnent itt which it was placed, and in tlieother cese to lelevesueh binding' aetion and ,permit e tree circular adjustment of the cemqilete.

Having thus folly described my in volition what l. claim es new and desire to secure by Letters Patent, is:

l. IIn n. die stock, the combination of o, head or body provided witlre. series of redini de-jnws and e.y redini soelret sleeve for 'the attachment of u, handle, a 'oirculzirly -edjnstable' @am 'plate arranged at' one endooii seid 'hoofd endfedapted to impart' simulteneous rediniadjustment to the die jews, :i clamp. lever'piy'ted tothe head with "its .inner end represents of n cylindrical sha-pe, und provided with radial socket sleeves 2 for the usual reinovl able tubular handles 3 by which the manual rotation of the die stock is effected. At its rem' end said heed is provided with the usual revoluble oem plete 4 hy which the Work holding' jaws 5 :tre simultaneously moved in a radial direction to engage with or disengege from the Work, while et its front end said head is provided -with the usual i'evoluble cam plete 6 by which the screw-cutting jaws or dies 7 are simultaneously: adjusted in e radial l1xlirection rto the diameter required. Tli'e deseribed construetion islconimon to 'diestolgs notvjn general olnble Wedge sleeve screwing zupon there# riphery of the' lij' dle socket with itsinner Wedge portion in' 'the outer 'end of theplamp lever.` V y 2. In a .die-stock, the combination 'oda' connectiontheretiith ,a eonstruetion-o parts l as followszy,

8 are e peiriioflever ola-inps arranged in opposed diemetrio relation at the margin yf, the eirculer cern plate 6 aforesaid, and

radial die jaws and a. radial socket sleeve for tlientt-aehment of e handle, e cireulerly adjustable cem plate arranged ut one end of said heed and adapted to impart simultanelike pivotal connections, to the header body inner end beerng upon the com platgrlnd Patented Msi-1u 14, 191i.

oeretive engegement'irith 1 ous radial adjustment to the die immo' clamp lever'pivoted to the heed with,l its l.

head or body provided'with e `series ofi-295 a l'evoluble wedge sleeve screwingr upon the Signed at Chicago, Illinois, this 3rd day periphery of the handle socket with its of September 1910.

inner wedge portion in operative engagenient with the outer end of the clamp lever, VVILLIAM H'LEAVER" 5 the abutting portions of the clamp leverI Witnesses:

and cam plate. beingl beveled to hold the I ROBERT BURNS, lever from a turning isplac-ement. D. N. JOHNSON. 

